Reserved report instances - criteria and settings can only be changed by users with administer reserved reports permission

Log work on this issue to Bluebird: http://senatedev.senate.state.ny.us/issues/show/5260

Access to changing the criteria for the Contact Logging Summary report instance which is used for the Change Log tab needs to be limited so that the tab view isn't altered globally for users unintentionally. Going forward, administrators may want to "reserve" criteria and settings for other report instances.

• Add is_reserved flag to civicrm_report_instance - default is 0
• Add 'administer reserved reports' permission (to CRM_Report_Info::getPermissions() )
• Add Reserved checkbox to report settings. Frozen except for users with 'administer reserved reports' permission
• If a report instance is accessed by users w/o 'administer reserved reports' permission - the Report Criteria and Report Settings panes are hidden. This is the same behavior as for users w/o 'access Report Criteria' permission.